It is this water-filled ball features that is elastic, so it won't break even if your child jumps on it, and it's great for your kids to play with. This water-filled ball can be filled with water to make it cool to the touch, so your child can have a cool and happy summer day. Using high-quality TPR material, this product is sturdy, and shake-proof. There are two sizes to choose from: S, M, L, XL It is suitable for outdoor and home use such as swimming pools, beaches, etc. Item Name: Water-filled Ball Material: TPR Color: Blue, Yellow, Green, Pink Features: Giant, Elastic, Portable Size Details: S Water-filled Ball Max Diameter: 40cm/15.75" (Approx.) M Water-filled Ball Max Diameter: 60cm/23.62" (Approx.) L Water-filled Ball Max Diameter: 80cm/31.5" (Approx.) XL Water-filled Ball Max Diameter: 130cm/51.18" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: S M L 1 x Water-filled Ball 1 x Blowpipe or XL 1 x Water-filled Ball